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Revision of the Polynemadikobraz species-group with description of a remarkable new species from South Africa (Hymenoptera, Chalcidoidea, Mymaridae).

ABSTRACT: A new Afrotropical species of Polynema Haliday, 1833 (Hymenoptera: Mymaridae), Polynema (Polynema) sagittaria van Noort & Triapitsyn, sp. n., is described and illustrated based on specimens collected in the Cape Floral region in south-western South Africa. This species is morphologically closely related to the recently described Polynema (Polynema) dikobraz Triapitsyn, 2017 from Madagascar, both species possessing enlarged spine-like microtrichia on the fore wing disc that are unique among all the known world fairyflies. This new species belongs to the informal dikobraz species-group of the nominate subgenus of Polynema, which previously was only known from Madagascar. In addition, P.sagittaria has the ovipositor extending ventrally under the mesosoma to well in front of the head, in a bow-like curve, and housed in a narrow, anterior elongation of the metasoma, the basal sac. Occurrence and possible significance of such a bizarre ovipositor in other Mymaridae is discussed. All images and online keys are available on www.waspweb.org.

SUBMITTER: van Noort S

PROVIDER: S-EPMC6160806 | biostudies-other | 2018

REPOSITORIES: biostudies-other

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Revision of the Polynemadikobraz species-group with description of a remarkable new species from South Africa (Hymenoptera, Chalcidoidea, Mymaridae).

van Noort Simon S Triapitsyn Serguei V SV

ZooKeys 20180903 783

A new Afrotropical species of Polynema Haliday, 1833 (Hymenoptera: Mymaridae), Polynema (Polynema) sagittaria van Noort & Triapitsyn, sp. n., is described and illustrated based on specimens collected in the Cape Floral region in south-western South Africa. This species is morphologically closely related to the recently described Polynema (Polynema) dikobraz Triapitsyn, 2017 from Madagascar, both species possessing enlarged spine-like microtrichia on the fore wing disc that are uniq ...[more]

PMID: 30275727

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Project description:A total of 16 genera and 68 species of Chalcididae of Vietnam are taxonomically treated. Thirteen new species are described; the remaining 55 species are keyed, redescribed or provided with a diagnosis. Among these 37 species and eleven genera are recorded for the first time from Vietnam. The thirteen new species are: Antrocephalus neogalleriae Narendran & van Achterberg, sp. n.; Brachymeria neowiebesina Narendran & van Achterberg, sp. n., Brachymeria semirusula Narendran & van Achterberg, sp. n., Dirhinus neoclaviger Narendran & van Achterberg, sp. n., Epitranus narendrani van Achterberg, sp. n., Epitranus neonigriceps Narendran & van Achterberg, sp. n., Heydoniella vietnamensis Narendran & van Achterberg, sp. n., Megachalcis vietnamicus Narendran & van Achterberg, sp. n., Notaspidium vietnamicum Narendran & van Achterberg, sp. n., Oxycoryphe neotenax Narendran & van Achterberg, sp. n., Sthulapada neopadata Narendran & van Achterberg, sp. n., Sthulapada vietnamensis Narendran & van Achterberg, sp. n., and Tanycoryphus masii Narendran & van Achterberg, sp. n. The newly recorded genera are: Antrocephalus Kirby, 1883; Haltichella Spinola, 1811; Heydoniella Narendran, 2003; Hockeria Walker, 1834; Kriechbaumerella Dalla Torre, 1894; Notaspidium Dalla Torre, 1897; Oxycoryphe Kriechbaumer, 1894; Psilochalcis Kieffer, 1904; Sthulapada Narendran, 1989; Tanycorphus Cameron, 1905, and Trigonura Sichel, 1865. The following known species are recorded for the first time from Vietnam: Antrocephalus decipiens (Masi, 1929); Antrocephalus lugubris (Masi, 1932); Antrocephalus maculipennis (Cameron, 1905); Antrocephalus nasutus (Holmgren, 1869); Antrocephalus sepyra (Walker, 1846); Antrocephalus validicornis (Holmgren, 1868); Brachymeria alternipes (Walker, 1871); Brachymeria aurea (Girault, 1915); Brachymeria coxodentata Joseph, Narendran & Joy, 1972; Brachymeria euploeae (Westwood, 1837); Brachymeria hime Habu, 1960; Brachymeria jambolana Gahan, 1942; Brachymeria kamijoi Habu, 1960; Brachymeria lugubris (Walker, 1871); Brachymeria marmonti (Girault, 1924); Brachymeria minuta (Linnaeus, 1767); Brachymeria scutellocarinata Joseph, Narendran & Joy, 1972; Brachymeria shansiensis Habu, 1961; Brachymeria taiwana (Matsumura, 1910); Dirhinus anthracia Walker, 1846; Dirhinus claviger Bouček & Narendran, 1981; Epitranus albipennis Walker, 1874; Epitranus ater Bouček, 1982; Epitranus gauldi Bouček, 1982; Epitranus oxytelus Bouček, 1982; Epitranus ramnathi (Mani & Dubey, 1973); Haltichella delhensis Roy & Farooqi, 1984; Haltichella nipponensis Habu, 1960; Hockeria bangalorica Narendran, 1989; Hockeria guptai Narendran, 1989; Kriechbaumerella ayyari (Gahan, 1919); Kriechbaumerella cordigaster Roy & Farooqi, 1984; Kriechbaumerella destructor (Waterston, 1922); Kriechbaumerella nepalensis Narendran, 1989; Oxycoryphe scutellatus Narendran, 1989; Psilochalcis carinigena (Cameron, 1907), and Trigonura luzonensis Narendran, 1987. Brachymeria calopeplae Joseph, Narendran & Joy, 1972, is treated as a valid species.

Project description:The European species of Omphale Haliday (Eulophidae: Entedoninae) are revised. The revision includes 37 species, of which eleven are newly described and the remaining 26 species are redescribed. The species are classified into six species groups, with six unplaced species. All species are fully diagnosed and thoroughly illustrated. Identification keys are provided for females and males. Two new morphological features to aid classification and identification are introduced: male genitalia and wing interference patterns (WIPs). The former has been used successfully in the classification of New World Omphale and the latter is used for the first time in a taxonomic revision. Male genitalia in Omphale have considerable interspecific variation, an unusual trait among chalcidoid Hymenoptera, and are demonstrated to be useful for classification of species and species-groups, and they also possess the only autapomorphy for Omphale. WIPs are useful to help separate some species, but cannot be used to define either the genus or species groups. Distributional data are compiled for each species and suggest a pan-european distribution for most species. Gall-midges are the known hosts for 14 species, and the absence of host overlap between species suggests that host specialization is a driving force for speciation. Several Omphale species are known only from females, or have a strong female biased sex ratio, suggesting thelytokous development. Apart from the 37 species included in this revision, the status for nine additional species (names) in species group aetius remain unsolved. For nomenclatorial stability, a neotype is designated for Eulophus lugens Nees (= Omphale lugens (Nees)). Elachestus obscurus Förster and Derostenus sulciscuta Thomson are transferred from Holcopelte to Omphalecomb. n.Derostenus radialis Thomson and Achrysocharella americana Girault are synonymized with Omphale theana (Walker), and Omphale teresis Askew is synonymized with Omphale phruron (Walker), syn. n. The status of genus Pholema Graham is revised as it is removed from synonymy with Omphale and instead synonymized with Neochrysocharis Kurdjumov, syn. n., and the type species for Pholema, Pholema microstoma Graham, is transferred to Neochrysocharis, comb. n.Eugerium orbatum Szelényi, previously transferred to Omphale, is synonymized with Asecodes congruens (Nees), syn. n.

Dataset Information

Revision of the Polynemadikobraz species-group with description of a remarkable new species from South Africa (Hymenoptera, Chalcidoidea, Mymaridae).

Publications

Revision of the <i>Polynemadikobraz</i> species-group with description of a remarkable new species from South Africa (Hymenoptera, Chalcidoidea, Mymaridae).

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